[DO NOT MERGE] WIP

Signed-off-by: Caio Oliveira <caiooliveirafarias0@gmail.com>

.ci/linux/build-qt.sh

@@ -0,0 +1,62 @@
+#!/bin/bash -e
+
+# SPDX-FileCopyrightText: 2025 eden Emulator Project
+# SPDX-License-Identifier: GPL-3.0-or-later
+
+QT_VERSION="6.8.3"
+QT_SRC_DIR="$HOME/qt-src-$QT_VERSION"
+QT_BUILD_DIR="$HOME/qt-build-$QT_VERSION"
+QT_INSTALL_DIR="$HOME/qt-clang-$QT_VERSION"
+CLANG_BIN="/usr/bin/clang"
+CLANGPP_BIN="/usr/bin/clang++"
+
+if [ "${INSTALL_DEPS}" = "ON" ]; then
+    sudo apt-get update
+    sudo apt-get install -y build-essential perl python3 git \
+        "^libxcb.*" libx11-dev libx11-xcb-dev libxcb-xinerama0-dev \
+        libxcb-keysyms1-dev libxcb-icccm4-dev libxcb-image0-dev \
+        libxkbcommon-dev libxkbcommon-x11-dev libgl-dev libdbus-1-dev \
+        libasound2-dev libpulse-dev libudev-dev libfontconfig1-dev \
+        libcap-dev libssl-dev
+fi
+
+if [ ! -d "$QT_SRC_DIR" ]; then
+    mkdir -p "$QT_SRC_DIR"
+    cd "$QT_SRC_DIR"
+    wget https://download.qt.io/archive/qt/6.8/$QT_VERSION/single/qt-everywhere-src-$QT_VERSION.tar.xz
+    tar xf qt-everywhere-src-$QT_VERSION.tar.xz --strip-components=1
+fi
+
+mkdir -p "$QT_BUILD_DIR"
+cd "$QT_BUILD_DIR"
+
+"$QT_SRC_DIR/configure" \
+    -prefix "$QT_INSTALL_DIR" \
+    -opensource -confirm-license \
+    -nomake examples -nomake tests \
+    -no-pch \
+    -skip qt3d \
+    -skip qtcanvas3d \
+    -skip qtconnectivity \
+    -skip qtdatavis3d \
+    -skip qtdoc \
+    -skip qtgraphicaleffects \
+    -skip qtgamepad \
+    -skip qtquick3d \
+    -skip qtquicktimeline \
+    -skip qtx11extras \
+    -skip qtwebengine \
+    -skip qtgraphs \
+    -skip qtquick3dphysics \
+    -skip qtspeech \
+    -platform linux-clang \
+    -device-option CXX="$CLANGPP_BIN" \
+    -device-option CC="$CLANG_BIN" \
+    -release \
+    -force-debug-info \
+    "CFLAGS=-march=native -mtune=native -O3 -pipe" \
+    "CXXFLAGS=-march=native -mtune=native -O3 -pipe"
+
+cmake --build . --parallel $(nproc)
+
+cmake --install .

.ci/linux/build.sh

@@ -97,7 +97,7 @@ cmake .. -G Ninja \
     -DCMAKE_CXX_FLAGS="$ARCH_FLAGS" \
     -DCMAKE_C_FLAGS="$ARCH_FLAGS" \
     -DYUZU_USE_BUNDLED_QT=OFF \
-    -DYUZU_USE_BUNDLED_SDL2=OFF \
+    -DYUZU_USE_BUNDLED_SDL2=ON \
     -DYUZU_USE_EXTERNAL_SDL2=ON \
     -DYUZU_TESTS=OFF \
     -DYUZU_USE_QT_MULTIMEDIA=$MULTIMEDIA \

CMakeLists.txt

@@ -137,11 +137,18 @@ if (PLATFORM_FREEBSD)
     set(CMAKE_EXE_LINKER_FLAGS "${CMAKE_EXE_LINKER_FLAGS} -L/usr/local/lib")
 endif()
 
+# Cross Compile Options
+
+if (MSVC OR ANDROID)
+    option(YUZU_PREFER_EXTERNAL "Prefer building 'external' system libraries instead of bundled libraries" ON)
+endif()
+
 # SDL2 / QT Frontend Options
 
 # On Linux system SDL2 is likely to be lacking HIDAPI support which have drawbacks but is needed for SDL motion
-cmake_dependent_option(ENABLE_SDL2 "Enable the SDL2 frontend" ON "NOT ANDROID" OFF)
-cmake_dependent_option(YUZU_USE_EXTERNAL_SDL2 "Compile external SDL2" OFF "ENABLE_SDL2;NOT MSVC" OFF)
+cmake_dependent_option(ENABLE_SDL2 "Enable the SDL2 frontend" OFF "ANDROID" ON)
+    cmake_dependent_option(YUZU_USE_EXTERNAL_SDL2 "Compile external SDL2" ON "ENABLE_SDL2;NOT MSVC" OFF)
+cmake_dependent_option(YUZU_USE_CPM "Use CPM to fetch system dependencies (fmt, boost, etc.). Externals will still be fetched." OFF YUZU_PREFER_EXTERNAL ON)
 
 option(ENABLE_QT "Enable the Qt frontend" ON)
 option(ENABLE_QT_TRANSLATION "Enable translations for the Qt frontend" OFF)
@@ -154,7 +161,7 @@ set(YUZU_QT_MIRROR "" CACHE STRING "Mirror URL for downloading bundled Qt librar
 
 # Core Build Options
 
-option(YUZU_USE_CPM "Use CPM to fetch system dependencies (fmt, boost, etc.). Externals will still be fetched." OFF)
+cmake_dependent_option(YUZU_USE_CPM "Use CPM to fetch system dependencies (fmt, boost, etc.). Externals will still be fetched." OFF YUZU_PREFER_EXTERNAL ON)
 option(YUZU_USE_PRECOMPILED_HEADERS "Use precompiled headers" OFF)
 option(YUZU_TESTS "Compile tests" "${BUILD_TESTING}")
 
@@ -199,8 +206,12 @@ endif()
 
 option(YUZU_ENABLE_LTO "Enable link-time optimization" OFF)
 if (YUZU_ENABLE_LTO)
+    cmake_policy(SET CMP0069 NEW)
     include(CheckIPOSupported)
     check_ipo_supported(RESULT COMPILER_SUPPORTS_LTO)
+    if(NOT COMPILER_SUPPORTS_LTO)
+        message(WARNING "LTO is not supported!")
+    endif()
     set(CMAKE_INTERPROCEDURAL_OPTIMIZATION ${COMPILER_SUPPORTS_LTO})
 endif()
 
@@ -244,7 +255,6 @@ if (MSVC OR ANDROID)
     set(YUZU_USE_EXTERNAL_SDL2 ON)
     set(YUZU_USE_CPM ON)
     set(YUZU_USE_BUNDLED_FFMPEG ON)
-    set(YUZU_USE_PRECOMPILED_HEADERS ON)
 endif()
 
 if (ANDROID AND YUZU_DOWNLOAD_ANDROID_VVL)